First, the applicant for patent must be able to demonstrate that he or she has developed a new, useful, and not obvious process or product. The Patent and Trademark Resource Center at Minneapolis Central Library offers access to powerful search tools for researching patents and trademarks.Filing codes should be as close to the caption of the document that is being filed as possible. • The informal notice code is "other document". This tutorial will focus on patents and the process for securing a patent in the U.S. First, let's consider why we have a patent system? Register as a non-contracted provider. Non-contracted providers do not have signed agreements with us; they are considered out of network. If an invention has been described in writing in a patent or other printed publication, it is NOT con-. Non-contracted providers do not have signed agreements with us; they are considered out of network.